Revert "Support getting transform state in IpSecService"

This reverts commit ab5006c17d.

Reason for revert: b/316010034 breaking VCN unit tests

Change-Id: I68cb1a99bb6e492c16901972d201761cd00df6fa

framework-t/src/android/net/IpSecManager.java

@@ -65,13 +65,6 @@ import java.util.Objects;
 public class IpSecManager {
     private static final String TAG = "IpSecManager";
 
-    // TODO : remove this class when udc-mainline-prod is abandoned and android.net.flags.Flags is
-    // available here
-    /** @hide */
-    public static class Flags {
-        static final String IPSEC_TRANSFORM_STATE = "com.android.net.flags.ipsec_transform_state";
-    }
-
     /**
      * Feature flag to declare the kernel support of updating IPsec SAs.
      *
@@ -1091,12 +1084,6 @@ public class IpSecManager {
         }
     }
 
-    /** @hide */
-    public IpSecTransformState getTransformState(int transformId)
-            throws IllegalStateException, RemoteException {
-        return mService.getTransformState(transformId);
-    }
-
     /**
      * Construct an instance of IpSecManager within an application context.
      *